Terraform Mods for RIG support

[bluecrayon52]

Issue #, if available:

Description of changes:
Added conditional boolean variables to intelligently modify helm chart instillations, modify coredns and vpc cni plugins, extend execution role permissions, and add lambda and sqs vpc endpoints based on restricted instance group configuration.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[nghtm]

Went to try to deploy with updates, but not clear what custom.tfvars values need to be set for RIG deployment. Can we update the readme with an example to test?

Looking at:
https://registry.terraform.io/providers/hashicorp/awscc/latest/docs/resources/sagemaker_cluster#nestedatt--instance_groups:~:text=restricted_instance_groups%20(Attributes%20List)%20The%20restricted%20instance%20groups%20of%20the%20SageMaker%20HyperPod%20cluster.%20(see%20below%20for%20nested%20schema)

I believe it should be:

cat > custom.tfvars << EOL 
kubernetes_version = "1.32"
eks_cluster_name = "my-eks-cluster"
hyperpod_cluster_name = "my-hp-rig-cluster"
resource_name_prefix = "hp-eks-rig-test"
aws_region = "us-east-1"
availability_zone_id  = "use1-az6"
restricted_instance_groups = {
    accelerated-instance-group-1 = {
        instance_type = "ml.g5.12xlarge",
        instance_count = 1,
        ebs_volume_size_in_gb = 100,
        threads_per_core = 2,
        enable_stress_check = false,
        enable_connectivity_check = false,
        lifecycle_script = "on_create.sh"
        fsxl_per_unit_storage_throughput = 250
        fsxl_size_in_gi_b = 2400
    }
}
EOL

[bluecrayon52]

@nghtm I've updated the README.md with a detailed RIG section. There is an example rig_custom.tfvars file that can be used as a reference.